Does anyone use AAA's for BEC?

[jwt]

ubec rules

Why not just run a BEC module ,less weight and it will supply a far better regulated voltage then what a Rx pack would.

You also dont have to recharge or replace it after so many runs, I run BEC in all my boats and have never had an issue. Is there a reason why so may people dont use it ?

Jimmy

here here - i could not say it better...
this one works for me.

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4319&Product_Name=TURNIGY_3A_UBEC_w/_Noise_Reduction

tms

[sjslhill]

AAA Enloops are Sanyo NIMH cells that hold the charge, many use these now in aircraft. I use AAA and AA in all the kids toys and they are excellent.

[sjslhill]

For larger boats one might consider running 2, A123 or K2 18650 LiFEPO4 cell. These cells do not lose their charge either.

[Jimmy Sterling]

But why bother running an external Rx pack

[Simon.O.]

BEC, UBEC, Rx packs.........this has been gone over and nearly qualifies as an deceased equine.
3A's or AAA's will be fine for an Rx pack for a given application.

When I began my research into this subject I did some bench tests to determine my current draw and requirements.
I have no BEC out from my speedy so an Rx pack or UBEC is has to be.

I now run a square 9V cell in 3 of my hulls due to limited space and a 4xAA pack in 2 others as they can cope with the weight penalty.
To be honest I would use BEC if it were there and then use a UBEC as a second choice.
An Rx pack needs to be checked for power and trusted.

The answer to your question is this.
If 4 (5 is better) AAA cells will meet your power requirements and fit in the hull then go for it.
I have done a LOT of reading on the subject so do not be afraid to ask more.

We are all here to help each other with our boats.

[Meniscus]

For a ESC that I am using, I'm looking at exceeding the recommended voltage and continue to use BEC. With regards to UBEC, I'm mildly concerned about current draw for a servo that is a little overkill for the boat in use. So, I figured I'd slide an RX pack in there and be done. Curiosity got the better of me and I was wondering what others use or have used in the past.

So that's the reasoning behind why I was thinking rx pack. I may consider the UBEC, but I don't run those fancy/expensive lipos that some of you guys run!

[785boats]

I'm with you on this Jimmy.
Why use batteries at all ?
In all my boats (about 25 at last count) both FE & scale, brushed & brushless, metals & lipo, I've never used them.
If the ESC has BEC, I use it. If I'm going to exceed the recommended voltage for that BEC I'll disconnect it & use a UBEC.
If the ESC has no BEC then the UBEC is the obvious choice to me.
Never had a problem.

Meniscus.
I see your concern with a servo with a higher current draw but these UBECs have a current rating of 3A & can be switched to 6V for better efficiency. Input voltage is up to 42V. That will handle any servo you are likely to use .
There are many others on the market but that's the one I use.

http://www.r2hobbies.com/proddetail.php?prod=rcps81706_ub

All the best.
Paul.

[Meniscus]

Good info! Since I'm a rather new boater, I haven't used very much in the way of UBEC myself. I may have to try for myself!

[Simon.O.]

I know I am famous for draging up old threads !

Can anyone tell me why I should use 6v instead of 4.8v for Rx power.
This is for my latest rigger and I will be using Nimh AAA cells of 900mAh.
Space and weight are not the biggest issue ( Servo speed and strength has been tested on 4.8 and pans out fine for my needs )

I want to know if anyone has a good reason why 4.8v is not the go.
If not then I will use 4.8v for this project.

Bear in mind that I do use 9v square cells for my small 2S powered boats.

[EPower]

I know I am famous for draging up old threads !

Can anyone tell me why I should use 6v instead of 4.8v for Rx power.
This is for my latest rigger and I will be using Nimh AAA cells of 900mAh.
Space and weight are not the biggest issue ( Servo speed and strength has been tested on 4.8 and pans out fine for my needs )

I want to know if anyone has a good reason why 4.8v is not the go.
If not then I will use 4.8v for this project.

Bear in mind that I do use 9v square cells for my small 2S powered boats.

Hi Simon i have always used 6v 2700 Mah packs for my RX but then i come from gas boating background where we use 1/4 scale servos and need as much grunt as possible For your application i'm sure that 4.8v would be fine
Adrian

[Meniscus]

Simon, this is funny. Earlier in the week, I picked up a AAA battery holder and decided to put the appropriate connectors on it to eliminate using a BEC on one of my ESC's. I'm planning on running those disposable lithium batts because they don't seem to 'dump' under load and are lighter weight than the NiMH I have sitting around.

I was actually going to try today if I get to soldering the connector on with the other stuff I have to do.

[Jeff Wohlt]

I have used 9v cells forever....never a problem. Probably will go to the ubec.

I do like the rechargable AAA 5 each and stacked 3/2 and sealed. Thought about a cell phone battery and using the cell phone charger since I have several but not sure how it would work.

[H2OCamel]

I have been using voltage regulators ($3 at my LHS) with my 2100mAh sized lipos from my planes to power my hpr-115. I have droped down to the 700mAh From my e-flight blade cx They are cheap and I know they hold their charge and fit in everything I own. I used to use the AAA rapid recharcables (15min recharge time) in the battery holder but swithched after having the bateries pop out and twice the plastic broke on the holder. I still use the rapid rechargeables in my tx's they are 4yrs old and still going strong saving me tons of $$ in AAA's

Meniscus I have a brand new CC BEC if you want to try it it is very small and compact
http://www.offshoreelectrics.com/pro...tle-bec&cat=75

[Meniscus]

Sure, I'll try it. My main problem is when it comes to a few rigger builds. There's just so little room and I'd hate to make the tub that much larger to accommodate.

PM me a price plus shipping to 23320.

Thanks! I've never tried one myself to be honest. I used to run hovercrafts back in the 90's and did something similar then, but it was just a voltage regulator and archaic at that! LOL!

[bwells]

OKAY I give , what does UBEC stand for versus BEC ( batt eliminating circuit). I like the TURNIGY one and my new esc is opto but I don't what the hassle of more batteries. Thanks